<!DOCTYPE html>
<head>
    <style>
        .graph{
            width: 100px;
            height: 100px;
            border-radius: 100px 0 0 0;
            background-color: #000;
            transform: rotate(30deg);
        }
    </style>
</head>
<body>
    <div class="graph"></div>
</body>
</html>